EP0493563B1 - Assembly comprising a tyre and a removable bead inlay - Google Patents
Assembly comprising a tyre and a removable bead inlay Download PDFInfo
- Publication number
- EP0493563B1 EP0493563B1 EP91913035A EP91913035A EP0493563B1 EP 0493563 B1 EP0493563 B1 EP 0493563B1 EP 91913035 A EP91913035 A EP 91913035A EP 91913035 A EP91913035 A EP 91913035A EP 0493563 B1 EP0493563 B1 EP 0493563B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- rim
- protector
- rotation
- tyre
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011324 bead Substances 0.000 title claims abstract description 32
- 230000001012 protector Effects 0.000 claims abstract description 41
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 4
- 238000003490 calendering Methods 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/02—Seating or securing beads on rims
- B60C15/024—Bead contour, e.g. lips, grooves, or ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/16—Sealing means between beads and rims, e.g. bands
Definitions
- the present invention relates to independent tubeless tires intended to be mounted on rims whose seats are inclined, with respect to the axis of rotation of the mounted tire, by an angle equal to 15 ° ⁇ 1 ° according to the standards. In progress.
- Such a tire has a radial carcass reinforcement, anchored in each bead to at least one bead, generally formed of wires with rectangular section. Axially outside the inverted part of the carcass reinforcement is arranged a sheet of wires or cables making an angle of about 20 ° with the circumferential direction, this sheet being intended to stiffen the part of the bead concerned.
- Document JP-A-61-257304 shows a tire assembly formed by a tire and a rubber cushion interposed between the rim and the bead of the tire.
- the invention proposes replacing the tire normally mounted on the rim with frustoconical seats 15 ° by an assembly formed by a tire and a reinforced removable bead protector, capable of ensure correct mounting of the pneumatic casing, the necessary tightness, and be easily replaced after degradation during driving.
- removable protective rod should be understood to mean any circular ring, having a cross section of any shape and any composition, insofar as this composition has an extension module at least equal to 4000 MPa.
- This ring could for example be made of any known plastic material, but could also be, like the usual rods, composed of several assembled wires or cables, or else several wires or cables coated in a plastic or elastic material and assembled.
- the cross section is preferably circular and the rod of the braided type, that is to say formed of wires or cables wound around a central core which can be a wire or a cable.
- the advantage of this type of bead wire is to have a certain extension under stress, a possible extension which facilitates the mounting of the axially outer part of the removable protector on the rim flange, while offering a better distribution of the stresses.
- the diameter of the cross section of the rod depends on the desired resistance, but is preferably chosen so that the junction zone between the angle generator ( ⁇ ) of the radially outer profile of the protector and the axially inner end inner profile is circular, with the same thickness (e / 2) around the rod, circularly coated with vulcanized rubber.
- the wires or cables of the tablecloth wound around the rod of the removable protector may be textile or metallic. They are preferably textile because they are less conductive of heat.
- FIGS. 1A, 1B, 1C show separately, each element of the assembly: the rim with standard conical seats, the removable protector, and the bead of the tire.
- the rim (J) in Figure 1A is a standard 22.5 x 9.00 rim, the contours and dimensions of which are found, for example, in the book by the "Tire and Rim Association".
- This rim (J) mainly comprises, as regards the invention, a frustoconical seat (10), the generator of the truncated cone making an angle ( ⁇ ) of 15 ⁇ 1 ° with the axis of rotation of the tire, and a rim flange (12) formed by a portion circular of radius R2 (12.7 mm), connected to the frustoconical seat (10) by a second circular portion (11) of radius R1 (8 mm).
- the rim widths (A), of the frustoconical seat (P), as well as the distance (L) axially separating the axially outer end of the frustoconical seat (10) from the plane (XX ') in which the circle is located, place of the points on the rim flange furthest from the axis of rotation are normalized.
- the above circle has a diameter D J (597 mm), which is the diameter of the rim flange (12).
- This diameter (D J ) of the rim flange is greater by a quantity 2R2 (25.4 mm) than the diameter D N , nominal diameter of the rim (J), equal to 571.5 mm.
- FIG 1B showing the contours, dimensions and structure of the removable protector (2) appear the dimensions of the radially inner and outer profiles of the protector (2).
- the radially inner profile is made up of a frustoconical zone, the generator (20) of which forms the angle of rotation ( ⁇ ) of the frustoconical seat (10) of the rim (J) with the axis of rotation of the tire, i.e. - say 15 ⁇ 1 °.
- the generator (20) is extended axially outside by an arc (21) of radius (R1 '), identical to the corresponding radius (R1) of the rim (J), itself extended by an arc of circle (22) of radius (R'2) identical to the radius (R2) of the corresponding portion (12) of the rim (J).
- the axially outer end of this portion (22) lies in the plane (XX ') containing the diameter (D J ) of the rim flange (12).
- the radially inner profile (20, 21, 22) of the protector (2) is therefore identical to the profile (10, 11, 12) of the rim (J), but it is generally closer the axis of rotation of a quantity D B being the diameter of the circle, place of the points of this interior profile furthest from the axis of rotation of the tire.
- the inner profile (20, 21, 22) of the protector (2) is deduced from the profile (10, 11, 12) of the standardized rim (J) by a radial translation of a quantity towards the axis of rotation.
- the width P ′ of the removable protector measured as being the width of the frustoconical zone of the radially inner profile is in this example equal to the width P of the seat of the rim (J).
- the generator (20 ') is extended by the arc of a circle (21') with radius R'1 of 8 mm.
- the generator (22') which makes an angle of 60 ° with the axis of rotation.
- This generator (22 ') is connected to the circular arc (22) of the radially inner profile (20, 21, 22) by a curve (23), which is, in the case studied, a circle.
- the removable protector (2) is reinforced in its axially outer part with a rod (3) surrounded by a coating mixture (30).
- This rod (3) is of the braided type and its internal diameter D T is equal to 606 mm so that the tightening (s) defined by the ratio described above is equal to 0.18.
- This tightening associated with the fact that the interior profile of the protector (2) has overall a nominal diameter (D ' N ) smaller than the nominal diameter (D N ) of the rim, the quantity D J -D B , allows on the one hand an easy installation of the protector (2) on the rim (J), but also a perfect maintenance of this protector on the rim (J).
- Around the rod (3) is wound a sheet (4) of polyamide 1680 x 3 cables.
- the sheet (4) gives rise to two layers (41) and (42) superimposed on each other, in particular reinforcing the part axially internal to the protector.
- the two strands of the sheet (4) are separated by a rubber mixture (40) or stuffing.
- the calendering (40 ') of the ply (4) is asymmetrical, so that it is thicker on one side than the other, the thicker side forming the outer sheath of the protector (2).
- the calendering with small thickness is 0.2 mm
- the layer of threads has a thickness of 0.8 mm and the calendering with high thickness is 1.0 mm.
- the radius of the cross section of the rod (3) is chosen such that the curve (23) connecting the arc of a circle (22) of the internal profile (20, 21, 22) to the frustoconical generator (22 ') with a 60 ° angle, i.e. a circle (23).
- FIG. 1c shows the bead (5) of the tire intended to be mounted on the rim (J) provided with two removable protectors (2).
- This bead (5) contains a rod (6) with rectangular wires, of section in the shape of a parallelogram, and around which is wound the carcass reinforcement (7) to form the upturn (7 ').
- the base of the bead (5) of width P '' less than P 'and equal to 33 mm consists of the frustoconical zone (80) making with the axis of rotation the angle ⁇ equal to 20 °, zone extended by l 'arc of circle (81), tangent to the frustoconical area (82) making the angle ( ⁇ ) of 60 ° with the axis of rotation of the tire.
- the nominal diameter of the bead (5) (D '' N ) is equal to (D ' N -e), which allows effective clamping of the bead (5) on the protector (2), and therefore the correct maintenance of the tire on the fitted rim protectors, whatever the driving conditions used.
- the tire and the removable protector (2) are manufactured separately, they can however be mounted on the service rim (J) either separately or together.
- the tire is put in place after correct positioning of the removable protector on the rim (J).
- the removable protector (2) is in a first operation bonded using a rubber-based dissolution to the bead (5) of the tire, and the pneumatic assembly is then mounted on the rim (J ).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
La présente invention concerne les pneumatiques sans chambre à air indépendante destinés à être montés sur des jantes dont les sièges sont inclinés, par rapport a l'axe de rotation du pneumatique monté, d'un angle égal à 15°± 1° selon les normalisations en cours.The present invention relates to independent tubeless tires intended to be mounted on rims whose seats are inclined, with respect to the axis of rotation of the mounted tire, by an angle equal to 15 ° ± 1 ° according to the standards. In progress.
Un tel pneumatique a une armature de carcasse radiale, ancree dans chaque bourrelet à au moins une tringle, géneralement formée de fils à section rectangulaire. Axialement à l'extérieur de la partie retournée de l'armature de carcasse est disposée une nappe de fils ou câbles faisant avec la direction circonférentielle un angle d'environ 20°, cette nappe étant destinée à rigidifier la partie du bourrelet concernée.Such a tire has a radial carcass reinforcement, anchored in each bead to at least one bead, generally formed of wires with rectangular section. Axially outside the inverted part of the carcass reinforcement is arranged a sheet of wires or cables making an angle of about 20 ° with the circumferential direction, this sheet being intended to stiffen the part of the bead concerned.
Lors de la vie du pneumatique, les portions de caoutchouc en contact avec la jante s'usent par frottement, et d'autant plus que des particules étrangères sont souvent présentes entre le caoutcouc et le métal de la jante (sable, poussières...). En outre, ces portions sont soumises a un échauffement non négligeable, échauffement pouvant être tel que le caoutchouc directement en contact avec la jante durcit et se "bakélise". Lors du rechapage de la bande de roulement du pneumatique après un certain nombre de kilomètres effectués, ces portions de bourrelet endommagées peuvent être réparées avec apport de caoutchouc. Ces opérations de réparation sont compliquées, longues et coûteuses.During the life of the tire, the rubber portions in contact with the rim wear out by friction, and all the more so since foreign particles are often present between the rubber and the metal of the rim (sand, dust ... ). In addition, these portions are subjected to a significant heating, heating may be such that the rubber directly in contact with the rim hardens and "bakelise". When retreading the tire tread after a certain number of kilometers, these damaged bead portions can be repaired with the addition of rubber. These repair operations are complicated, long and costly.
Le document JP-A-61-257304 montre un ensemble pneumatique formé d'un pneumatique et d'un coussin en caoutchouc intercalé entre la jante et le bourrelet du pneumatique.Document JP-A-61-257304 shows a tire assembly formed by a tire and a rubber cushion interposed between the rim and the bead of the tire.
Afin de remédier aux inconvénients cités ci-dessus, l'invention propose de remplacer le pneumatique se montant normalement sur la jante à sièges tronconiques 15° par un ensemble formé d'un pneumatique et d'un protecteur de bourrelet amovible renforcé, susceptible d'assurer un montage correct de l'enveloppe pneumatique, l'étanchéité nécessaire, et d'être remplacé aisément après dégradation en roulage.In order to remedy the drawbacks mentioned above, the invention proposes replacing the tire normally mounted on the rim with frustoconical seats 15 ° by an assembly formed by a tire and a reinforced removable bead protector, capable of ensure correct mounting of the pneumatic casing, the necessary tightness, and be easily replaced after degradation during driving.
Conformément a l'invention, l'ensemble pneumatique formé d'un pneumatique sans chambre à air, comprenant une bande de roulement, une armature de sommet, une armature de carcasse ancrée dans chaque bourrelet à au moins une tringle et d'un protecteur amovible, ensemble destiné à être monté sur une jante à sièges tronconiques à 15° de dimensions normalisees, caractérisé en ce que le protecteur amovible, destiné à s'insérer entre le bourrelet du pneumatique et la partie de jante composée du siège et du rebord de jante, est un anneau circulaire de caoutchouc renforcé, de largeur au moins égale à la largeur des sièges tronconiques de la jante et
- dont le profil radialement intérieur, vue en section méridienne, est identique au profil correspondant de la jante de service du pneumatique jusqu'au sommet du rebord de jante de diamètre DJ, mais dont les points les plus éloignés de l'axe de rotation du pneumatique sont sur un cercle de diamètre DB, perpendiculaire à l'axe de rotation, et compris entre 0,9 et 1 fois le diamètre DJ du rebord de jante,
- dont le profil radialement extérieur est composé d'une zone tronconique dont la génératrice est parallèle à la génératrice radialement intérieure, situee à une distance (e) de ladite génératrice, (e) étant compris entre 2 mm et 10 mm, et prolongée axialement à l'extérieur pour une zone en arc de cercle de rayon égal au rayon correspondant de la zone du profil intérieur, ladite zone en arc de cercle étant tangente à une zone tronconique dont la générative fait avec l'axe de rotation du pneumatique un angle β compris entre 45° et 90°, zone tronconique elle même reliée au profil radialement intérieur par une zone sensiblement circulaire entourant au moins une nappe de fils ou câbles orientés par rapport à la direction circonférentielle d'un angle compris entre 90° et 45°, et formant deux couches de renforcement s'étendant au moins jusqu'à la pointe axialement intérieure du protecteur, après enroulement autour d'une tringle de module d'extension au moins égale à 4000 MPa et située dans la partie du protecteur amovible destiné à recouvrir le rebord de jante, tel que le rapport
- whose radially inner profile, seen in meridian section, is identical to the corresponding profile of the service rim of the tire up to the top of the rim flange of diameter D J , but whose points furthest from the axis of rotation of the tires are on a circle of diameter D B , perpendicular to the axis of rotation, and between 0.9 and 1 times the diameter D J of the rim flange,
- whose radially outer profile is composed of a frustoconical zone whose generator is parallel to the radially inner generator, located at a distance (e) from said generator, (e) being between 2 mm and 10 mm, and extended axially to the outside for an arcuate area of radius equal to the corresponding radius of the inner profile area, said arcuate area being tangent to a frustoconical zone whose generative makes with the axis of rotation of the tire an angle β comprised between 45 ° and 90 °, frustoconical zone itself connected to the radially inner profile by a substantially circular zone surrounding at least one ply of wires or cables oriented relative to the circumferential direction by an angle between 90 ° and 45 °, and forming two reinforcing layers extending at least up to the axially inner point of the protector, after winding around a rod extension module at least equal to 4000 MPa and located in the part of the removable protector intended to cover the rim flange, such as the report
Il faut entendre par tringle du protecteur amovible tout anneau circulaire, ayant une section transversale de forme quelconque et une composition quelconque, dans la mesure où cette composition présente un module d'extension au moins égal à 4000 MPa.The term “removable protective rod” should be understood to mean any circular ring, having a cross section of any shape and any composition, insofar as this composition has an extension module at least equal to 4000 MPa.
Cet anneau pourra être par exemple en toute matière plastique connue, mais pourra être aussi, comme les tringles habituelles, composé de plusieurs fils ou câbles assemblés, ou alors plusieurs fils ou câbles enrobés dans une matière plastique ou élastique et assemblés.This ring could for example be made of any known plastic material, but could also be, like the usual rods, composed of several assembled wires or cables, or else several wires or cables coated in a plastic or elastic material and assembled.
La section transversale est préférentiellement circulaire et la tringle du type tressé, c'est-à-dire formée de fils ou câbles enroulés autour d'une âme centrale qui peut être un fil ou un câble. L'avantage de ce type de tringle est de présenter une certaine extension sous effort, extension possible qui facilite le montage de la partie axialement extérieure du protecteur amovible sur le rebord de jante, tout en offrant une meilleure répartition des contraintes.The cross section is preferably circular and the rod of the braided type, that is to say formed of wires or cables wound around a central core which can be a wire or a cable. The advantage of this type of bead wire is to have a certain extension under stress, a possible extension which facilitates the mounting of the axially outer part of the removable protector on the rim flange, while offering a better distribution of the stresses.
Le diamètre de la section transversale de la tringle est fonction de la résistance désirée, mais est choisi préférentiellement de manière à ce que la zone de jonction entre la génératrice d'angle (β) du profil radialement extérieur du protecteur et l'extrémité axialement intérieure du profil intérieur soit circulaire, avec la même épaisseur (e/2) autour de la tringle, enrobée circulairement de caoutchouc vulcanisé.The diameter of the cross section of the rod depends on the desired resistance, but is preferably chosen so that the junction zone between the angle generator (β) of the radially outer profile of the protector and the axially inner end inner profile is circular, with the same thickness (e / 2) around the rod, circularly coated with vulcanized rubber.
Les fils ou câbles de la nappe enroulée autour de la tringle du protecteur amovible peuvent être textiles ou métalliques. Ils sont préférentiellement textiles car moins conducteurs de la chaleur.The wires or cables of the tablecloth wound around the rod of the removable protector may be textile or metallic. They are preferably textile because they are less conductive of heat.
La description qui va suivre en regard du dessin annexé, donné à titre d'exemple, fera mieux comprendre comment l'invention est mise en oeuvre.The description which follows with reference to the appended drawing, given by way of example, will make it easier to understand how the invention is implemented.
Sur ce dessin, les figures 1A, 1B, 1C représentent de manière séparée, chaque élément de l'ensemble : la jante à sièges coniques normalisée, le protecteur amovible, et le bourrelet du pneumatique.In this drawing, FIGS. 1A, 1B, 1C show separately, each element of the assembly: the rim with standard conical seats, the removable protector, and the bead of the tire.
La jante (J) de la figure 1A est une jante 22.5 x 9.00 normalisée, dont les contours et les dimensions se trouvent, par exemple, dans le livre de la "Tire and Rim Association". Cette jante (J) comprend principalement, en ce qui concerne l'invention, un siège (10) tronconique, la génératrice du tronc de cône faisant avec l'axe de rotation du pneumatique un angle (α) de 15 ± 1°, et un rebord de jante (12) formé d'une portion circulaire de rayon R₂ (12,7 mm), reliée au siège tronconique (10) par une deuxième portion circulaire (11) de rayon R₁ (8 mm). Les largeurs de jante (A), du siège tronconique (P), ainsi que la distance (L) séparant axialement l'extrémité axialement extérieure du siège tronconique (10) du plan (XX') dans lequel est contenu le cercle, lieu des points du rebord de jante les plus éloignés de l'axe de rotation, sont normalisés. Le cercle ci-dessus a un diamètre DJ(597 mm), qui est le diamètre du rebord de jante (12).The rim (J) in Figure 1A is a standard 22.5 x 9.00 rim, the contours and dimensions of which are found, for example, in the book by the "Tire and Rim Association". This rim (J) mainly comprises, as regards the invention, a frustoconical seat (10), the generator of the truncated cone making an angle (α) of 15 ± 1 ° with the axis of rotation of the tire, and a rim flange (12) formed by a portion circular of radius R₂ (12.7 mm), connected to the frustoconical seat (10) by a second circular portion (11) of radius R₁ (8 mm). The rim widths (A), of the frustoconical seat (P), as well as the distance (L) axially separating the axially outer end of the frustoconical seat (10) from the plane (XX ') in which the circle is located, place of the points on the rim flange furthest from the axis of rotation are normalized. The above circle has a diameter D J (597 mm), which is the diameter of the rim flange (12).
Ce diamètre (DJ) du rebord de jante est supérieur d'une quantité 2R₂ (25,4 mm) au diamètre DN, diamètre nominal de la jante (J), égal à 571,5 mm.This diameter (D J ) of the rim flange is greater by a quantity 2R₂ (25.4 mm) than the diameter D N , nominal diameter of the rim (J), equal to 571.5 mm.
Sur la figure 1B, montrant les contours, dimensions et structure du protecteur amovible (2) apparaissent les dimensions des profils radialement intérieur et extérieur du protecteur (2). Le profil radialement intérieur se compose d'une zone tronconique dont la génératrice (20) fait avec l'axe de rotation du pneumatique l'angle (α) du siège tronconique (10) de la jante (J), c'est-à-dire à 15 ± 1°. La génératrice (20) est prolongée axialement à l'extérieur par un arc de cercle (21) de rayon (R₁'), identique au rayon (R₁) correspondant de la jante (J), lui-même prolongé d'un arc de cercle (22) de rayon (R'₂) identique au rayon (R₂) de la portion correspondante (12) de la jante (J). L'extrémité axialement extérieure de cette portion (22) se trouve dans le plan (XX') contenant le diamètre (DJ) du rebord de jante (12). Le profil radialement intérieur (20, 21, 22) du protecteur (2) est donc identique au profil (10, 11, 12) de la jante (J), mais il est globalement plus proche de l'axe de rotation d'une quantité
DB étant le diamètre du cercle, lieu des points de ce profil intérieur les plus éloignés de l'axe de rotation du pneumatique. Autrement dit, le profil intérieur (20, 21, 22) du protecteur (2) se déduit du profil (10, 11, 12) de la jante normalisée (J) par une translation radiale d'une quantité
vers l'axe de rotation. La largeur P' du protecteur amovible, mesurée comme étant la largeur de la zone tronconique du profil radialement intérieur est égale dans cet exemple à la largeur P du siège de la jante (J).In Figure 1B, showing the contours, dimensions and structure of the removable protector (2) appear the dimensions of the radially inner and outer profiles of the protector (2). The radially inner profile is made up of a frustoconical zone, the generator (20) of which forms the angle of rotation (α) of the frustoconical seat (10) of the rim (J) with the axis of rotation of the tire, i.e. - say 15 ± 1 °. The generator (20) is extended axially outside by an arc (21) of radius (R₁ '), identical to the corresponding radius (R₁) of the rim (J), itself extended by an arc of circle (22) of radius (R'₂) identical to the radius (R₂) of the corresponding portion (12) of the rim (J). The axially outer end of this portion (22) lies in the plane (XX ') containing the diameter (D J ) of the rim flange (12). The radially inner profile (20, 21, 22) of the protector (2) is therefore identical to the profile (10, 11, 12) of the rim (J), but it is generally closer the axis of rotation of a quantity
D B being the diameter of the circle, place of the points of this interior profile furthest from the axis of rotation of the tire. In other words, the inner profile (20, 21, 22) of the protector (2) is deduced from the profile (10, 11, 12) of the standardized rim (J) by a radial translation of a quantity
towards the axis of rotation. The width P ′ of the removable protector, measured as being the width of the frustoconical zone of the radially inner profile is in this example equal to the width P of the seat of the rim (J).
Quant au profil radialement extérieur (20', 21', 22') du protecteur (2), il se compose de la génératrice (20') parallèle à la génératrice (20) mais séparée de celle-ci de la distance e = 4 mm. La génératrice (20') est prolongée par l'arc de cercle (21') de rayon R'₁ de 8 mm. A cet arc de cercle (21') tangente la génératrice (22') qui fait avec l'axe de rotation un angle de 60°. Cette génératrice (22') est reliée à l'arc de cercle (22) du profil radialement intérieur (20, 21, 22) par une courbe (23), qui est, dans le cas étudié, un cercle.As for the radially outer profile (20 ', 21', 22 ') of the protector (2), it consists of the generator (20') parallel to the generator (20) but separated from the latter by the distance e = 4 mm. The generator (20 ') is extended by the arc of a circle (21') with radius R'₁ of 8 mm. To this arc of circle (21 ') tangent the generator (22') which makes an angle of 60 ° with the axis of rotation. This generator (22 ') is connected to the circular arc (22) of the radially inner profile (20, 21, 22) by a curve (23), which is, in the case studied, a circle.
Le protecteur amovible (2) est renforcé dans sa partie axialement extérieure d'une tringle (3) entourée d'un mélange d'enrobage (30). Cette tringle (3) est du type tressé et son diamètre intérieur DT est égal à 606 mm de sorte que le serrage (s) défini par le rapport décrit ci-dessus est égal à 0,18. Ce serrage, associé au fait que le profil intérieur du protecteur (2) a globalement un diamètre nominal (D'N) inférieur au diamètre nominal (DN) de la jante, de la quantité DJ-DB, permet d'une part une mise en place facile du protecteur (2) sur la jante (J), mais aussi un maintien parfait de ce protecteur sur la jante (J). Autour de la tringle (3) est enroulée une nappe (4) de câbles de polyamide 1680 x 3. Ces fils font avec la direction circonférentielle un angle de 90°, et la nappe (4) donne naissance à deux couches (41) et (42) superposées l'une sur l'autre, renforçant en particulier la partie axialement intérieure au protecteur. Avant la superposition des deux couches (41) et (42), les deux brins de la nappe (4) sont séparés par un mélange de caoutchouc (40) ou bourrage. Le calandrage (40') de la nappe (4) est assymétrique, de manière à ce qu'il soit plus épais d'un côté que de l'autre, le côté le plus épais formant le gainage extérieur du protecteur (2). Dans le cas étudié, pour l'épaisseur globale (e) donnée, le calandrage à épaisseur faible est de 0,2 mm, la couche de fils a une épaisseur de 0,8 mm et le calandrage à épaisseur forte est de 1,0 mm.The removable protector (2) is reinforced in its axially outer part with a rod (3) surrounded by a coating mixture (30). This rod (3) is of the braided type and its internal diameter D T is equal to 606 mm so that the tightening (s) defined by the ratio described above is equal to 0.18. This tightening, associated with the fact that the interior profile of the protector (2) has overall a nominal diameter (D ' N ) smaller than the nominal diameter (D N ) of the rim, the quantity D J -D B , allows on the one hand an easy installation of the protector (2) on the rim (J), but also a perfect maintenance of this protector on the rim (J). Around the rod (3) is wound a sheet (4) of polyamide 1680 x 3 cables. These wires make an angle of 90 ° with the circumferential direction, and the sheet (4) gives rise to two layers (41) and (42) superimposed on each other, in particular reinforcing the part axially internal to the protector. Before the two layers (41) and (42) are superimposed, the two strands of the sheet (4) are separated by a rubber mixture (40) or stuffing. The calendering (40 ') of the ply (4) is asymmetrical, so that it is thicker on one side than the other, the thicker side forming the outer sheath of the protector (2). In the case studied, for the given overall thickness (e), the calendering with small thickness is 0.2 mm, the layer of threads has a thickness of 0.8 mm and the calendering with high thickness is 1.0 mm.
Le rayon de la section transversale de la tringle (3), comme montré sur la figure 1B, est choisi tel que la courbe (23) reliant l'arc de cercle (22) du profil intérieur (20, 21, 22) à la génératrice tronconique (22') d'angle 60°, soit un cercle (23).The radius of the cross section of the rod (3), as shown in FIG. 1B, is chosen such that the curve (23) connecting the arc of a circle (22) of the internal profile (20, 21, 22) to the frustoconical generator (22 ') with a 60 ° angle, i.e. a circle (23).
La figure 1c montre le bourrelet (5) du pneumatique destine a être monté sur la jante (J) munie de deux protecteurs amovibles (2). Ce bourrelet (5) contient une tringle (6) à fils rectangulaires, de section en forme de parallélogramme, et autour de laquelle vient s'enrouler l'armature de carcasse (7) pour former le retournement (7'). La base du bourrelet (5) de largeur P'' inférieure à P' et égale à 33 mm se compose de la zone tronconique (80) faisant avec l'axe de rotation l'angle γ égal à 20°, zone prolongée de l'arc de cercle (81), tangent à la zone tronconique (82) faisant l'angle (β) de 60° avec l'axe de rotation du pneumatique. Le diamètre nominal du bourrelet (5) (D''N) est égal à (D'N-e), ce qui permet un serrage efficace du bourrelet (5) sur le protecteur (2), et donc le maintien correct du pneumatique sur la jante munie de protecteurs, quelles que soient les conditions de roulage utilisées.FIG. 1c shows the bead (5) of the tire intended to be mounted on the rim (J) provided with two removable protectors (2). This bead (5) contains a rod (6) with rectangular wires, of section in the shape of a parallelogram, and around which is wound the carcass reinforcement (7) to form the upturn (7 '). The base of the bead (5) of width P '' less than P 'and equal to 33 mm consists of the frustoconical zone (80) making with the axis of rotation the angle γ equal to 20 °, zone extended by l 'arc of circle (81), tangent to the frustoconical area (82) making the angle (β) of 60 ° with the axis of rotation of the tire. The nominal diameter of the bead (5) (D '' N ) is equal to (D ' N -e), which allows effective clamping of the bead (5) on the protector (2), and therefore the correct maintenance of the tire on the fitted rim protectors, whatever the driving conditions used.
Si le pneumatique et le protecteur amovible (2) sont fabriqués séparément, ils peuvent par contre être montés sur la jante de service (J) soit séparément, soit ensemble. Dans le premier cas le pneumatique est mis en place après positionnement correct du protecteur amovible sur la jante (J). Dans le deuxième cas, le protecteur amovible (2) est dans une première opération collé à l'aide d'une dissolution à base de caoutchouc au bourrelet (5) du pneumatique, et l'ensemble pneumatique est alors monté sur la jante (J).If the tire and the removable protector (2) are manufactured separately, they can however be mounted on the service rim (J) either separately or together. In the first case, the tire is put in place after correct positioning of the removable protector on the rim (J). In the second case, the removable protector (2) is in a first operation bonded using a rubber-based dissolution to the bead (5) of the tire, and the pneumatic assembly is then mounted on the rim (J ).
Claims (4)
- A tyre assembly formed of a tyre without independent inner tube, comprising, in addition to a tread and a tread reinforcement, a radial carcass reinforcement (7) anchored in each bead (5) on at least one bead ring (6), and a removable protector (2), which assembly is intended to be mounted on a rim (J) with 15° frustoconical seats (10) and standard dimensions, characterised in that the removable protector (2) which is intended to be inserted between the bead (5) of the tyre and the part of the rim (J) formed of the seat (10) and the rim flange (12) is a circular ring of reinforced rubber, of a width (P'') at least equal to the width (P) of the rim seats (J),- the radially inner profile (20, 21, 22) of which, viewed in meridian section, is identical to the corresponding profile (10, 11, 12) of the service rim (J) of the tyre up to the top of the rim flange of diameter DJ, but the points of which furthest from the axis of rotation of the tyre are on a circle of diameter (DB) perpendicular to the axis of rotation, which is between 0.9 and 1 times the diameter (DJ) of the rim flange,- the radially outer profile (20', 21', 22') of which is formed of a frustoconical zone (20') the generatrix of which is parallel to the radially inner generatrix (20), located at a distance (e) from said generatrix (20), (e) being between 2 mm and 10 mm, and extended axially towards the outside by a zone (21') in the form of a circular arc having a radius equal to the corresponding radius (R'₁) of the zone (21) of the inner profile, said zone (21') being tangent to a frustoconical zone (22') the generatrix of which forms an angle (β) of between 45° and 90° with the axis of rotation, the zone (22') being connected to the radially inner profile (20, 21, 22) by a substantially circular zone (23) surrounding at least one ply (4) of cords or cables which are oriented at an angle of between 90° and 45° with respect to the circumferential direction and forming two reinforcement layers (41, 42) extending up to the axially inner point of the protector (2), after winding around a bead ring (3) of a modulus of extension at least equal to 4000 MPa, located in the part of the removable protector intended to cover the rim flange, such that the ratio
- and in that the tyre has beads (5) the base of which has an axial width (P'') at most equal to the axial width (P') of the removable protector (2) is formed by a frustoconical zone (80), the generatrix of which forms an angle (γ) of between 15° and 25° with the axis of rotation of the tyre, followed axially towards the outside by a circular arc (81) at a tangent to a second frustoconical zone (82), the generatrix of which forms the angle (β) with the axis of rotation. - A removable protector forming part of an assembly according to Claim 1, characterised in that the bead ring (3) is a bead ring of circular cross-section and of braided type.
- A protector according to Claim 2, characterised in that the bead ring (3) has a cross-section the radius of which is such that the junction zone (23) between the radially inner and outer profiles is circular.
- A protector according to one of Claims 2 to 3, characterised in that the ply (4) is formed of polyamide cables.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9009212A FR2664857B1 (en) | 1990-07-17 | 1990-07-17 | PNEUMATIC ASSEMBLY AND REMOVABLE BUCKET PROTECTOR. |
| FR9009212 | 1990-07-17 | ||
| PCT/FR1991/000568 WO1992001576A1 (en) | 1990-07-17 | 1991-07-12 | Assembly comprising a tyre and a removable bead inlay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0493563A1 EP0493563A1 (en) | 1992-07-08 |
| EP0493563B1 true EP0493563B1 (en) | 1995-01-25 |
Family
ID=9398888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91913035A Expired - Lifetime EP0493563B1 (en) | 1990-07-17 | 1991-07-12 | Assembly comprising a tyre and a removable bead inlay |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5232032A (en) |
| EP (1) | EP0493563B1 (en) |
| JP (1) | JPH05502414A (en) |
| AT (1) | ATE117626T1 (en) |
| AU (1) | AU637000B2 (en) |
| BR (1) | BR9105828A (en) |
| CA (1) | CA2065336C (en) |
| DE (1) | DE69107047T2 (en) |
| ES (1) | ES2069899T3 (en) |
| FR (1) | FR2664857B1 (en) |
| WO (1) | WO1992001576A1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5507333A (en) * | 1994-02-22 | 1996-04-16 | Trinc, Tire & Rim, Incorporated | Composite wheel |
| US5820709A (en) * | 1994-03-11 | 1998-10-13 | National Tire Co., Ltd. | Vehicle tire and rim combination |
| US5636673A (en) * | 1995-05-01 | 1997-06-10 | Trinc, Tire & Rim, Inc. | Composite wheel |
| CO4780033A1 (en) * | 1997-04-17 | 1999-05-26 | Titan International Inc | WHEEL AND RIM SET |
| US6478064B1 (en) * | 1998-05-15 | 2002-11-12 | Sumitomo Rubber Industries, Ltd. | Heavy duty radial tire with chafer height greater than bead apex height |
| US5967212A (en) * | 1998-05-21 | 1999-10-19 | Hameed; Hafeez | Wheel rim protector |
| FR2795022A1 (en) * | 1999-06-21 | 2000-12-22 | Michelin Soc Tech | Assembly has pneumatic tyre whose beads are connected by two deformable adapters to rim no more than half width of fully inflated tyre |
| JP2002337516A (en) | 2001-05-21 | 2002-11-27 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| US20050264095A1 (en) * | 2004-05-25 | 2005-12-01 | Eberhard Frank A | Tire and wheel assembly |
| GB0709845D0 (en) * | 2007-05-23 | 2007-07-04 | Rathbone Christopher L | Rim protector |
| US9067465B2 (en) * | 2010-02-25 | 2015-06-30 | Harley-Davidson Motor Company Group, LLC | Tubeless rim seal for a laced wheel |
| US8147004B2 (en) | 2010-05-25 | 2012-04-03 | Slobodan Milicevic | Vehicle wheel rim protector |
| FR3014362B1 (en) | 2013-12-11 | 2017-03-17 | Michelin & Cie | PERFECTIONED ROLLING ASSEMBLY |
| FR3015368B1 (en) * | 2013-12-19 | 2017-03-31 | Michelin & Cie | ADAPTER FOR ROLLING ASSEMBLY AND ROLLING ASSEMBLY COMPRISING SAME |
| FR3026052B1 (en) * | 2014-09-24 | 2018-02-16 | Compagnie Generale Des Etablissements Michelin | ADAPTER FOR ROLLING ASSEMBLY AND ROLLING ASSEMBLY COMPRISING SAME |
| FR3036064B1 (en) * | 2015-05-12 | 2017-05-12 | Michelin & Cie | ADAPTER FOR ROLLING ASSEMBLY AND ROLLING ASSEMBLY COMPRISING SAME |
| JP6645182B2 (en) * | 2015-12-25 | 2020-02-14 | 横浜ゴム株式会社 | Pneumatic tire |
| FR3050688B1 (en) * | 2016-05-02 | 2018-04-20 | Compagnie Generale Des Etablissements Michelin | ADAPTER FOR ROLLING ASSEMBLY AND ROLLING ASSEMBLY COMPRISING SAME |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2414883A1 (en) * | 1974-03-27 | 1975-10-02 | Hacker Dieter | Starter and operating cct. for D.C. operated fluorescent lamp - has feed voltage source and HV igniting source coupled to AC mains |
| DE2456419A1 (en) * | 1974-11-29 | 1976-08-12 | Continental Gummi Werke Ag | Automobile wheel with pneumatic tyre - has wheel rim supported against wheel body by rubber or plastic intermediate ring |
| US4108232A (en) * | 1976-10-28 | 1978-08-22 | The Goodyear Tire & Rubber Company | Shield for sealing a tubeless tire on a spoked wheel rim |
| GB2069421A (en) * | 1980-02-13 | 1981-08-26 | Minilite Ltd | Preventing tyre bead dislodgement |
| US4373567A (en) * | 1980-10-10 | 1983-02-15 | The Goodyear Tire & Rubber Company | Tire rim and adapter |
| US4658876A (en) * | 1983-04-12 | 1987-04-21 | The Uniroyal Goodrich Tire Company | Automotive vehicle tire and mounting system therefor |
| JPS61257304A (en) * | 1985-05-09 | 1986-11-14 | Sumitomo Rubber Ind Ltd | Cushion spacer for correction of ununiformity in tire |
-
1990
- 1990-07-17 FR FR9009212A patent/FR2664857B1/en not_active Expired - Fee Related
-
1991
- 1991-07-12 DE DE69107047T patent/DE69107047T2/en not_active Expired - Fee Related
- 1991-07-12 ES ES91913035T patent/ES2069899T3/en not_active Expired - Lifetime
- 1991-07-12 AT AT91913035T patent/ATE117626T1/en not_active IP Right Cessation
- 1991-07-12 WO PCT/FR1991/000568 patent/WO1992001576A1/en active IP Right Grant
- 1991-07-12 BR BR919105828A patent/BR9105828A/en not_active IP Right Cessation
- 1991-07-12 AU AU82176/91A patent/AU637000B2/en not_active Ceased
- 1991-07-12 CA CA002065336A patent/CA2065336C/en not_active Expired - Fee Related
- 1991-07-12 JP JP3512788A patent/JPH05502414A/en active Pending
- 1991-07-12 EP EP91913035A patent/EP0493563B1/en not_active Expired - Lifetime
- 1991-07-12 US US07/838,434 patent/US5232032A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2069899T3 (en) | 1995-05-16 |
| FR2664857B1 (en) | 1992-10-02 |
| CA2065336C (en) | 2000-05-30 |
| AU637000B2 (en) | 1993-05-13 |
| EP0493563A1 (en) | 1992-07-08 |
| AU8217691A (en) | 1992-02-18 |
| DE69107047D1 (en) | 1995-03-09 |
| JPH05502414A (en) | 1993-04-28 |
| BR9105828A (en) | 1992-08-18 |
| WO1992001576A1 (en) | 1992-02-06 |
| FR2664857A1 (en) | 1992-01-24 |
| ATE117626T1 (en) | 1995-02-15 |
| US5232032A (en) | 1993-08-03 |
| CA2065336A1 (en) | 1992-01-18 |
| DE69107047T2 (en) | 1995-05-24 |
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